How To Fix RSOBI_MF158 - DataSource &1 has no key fields; refer to long text for more information

SAP Error Message - Details

• Message type: E = Error

• Message class: RSOBI_MF - Messages for SOBI Model Factory

• Message number: 158

• Message text: DataSource &1 has no key fields; refer to long text for more information

What causes this issue?

The DataSource &V1& involves a DataSource attribute. The attributes and
compounding information for a characteristic are derived using the key
fields of a DataSource.
The DataSource &V1& does not have any key fields.

System Response

The individual fields of the DataSource &V1& are mapped to the
InfoObjects. Since the DataSource &V1& does not have any key fields, it
is not possible to derive any attributes and/or compounding information.
Furthermore, it is not possible to determine a "leading" characteristic.
As such, you cannot generate any transformations or a data transfer pr
ocess.

How to fix this error?

You have the following options:
You can execute the key information for the DataSource &V1& at a later
time/date. You can then restart the model generation. The objects that
could not be generated before are now created.
The lack of key fields in DataSource &V1& is deliberate. In this case,
you can ignore this warning.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSOBI_MF158 - DataSource &1 has no key fields; refer to long text for more information ?

  The SAP error message RSOBI_MF158 indicates that a DataSource does not have any key fields defined. This can occur when you are trying to replicate or use a DataSource in SAP BW (Business Warehouse) or SAP HANA, and the system requires key fields to uniquely identify records.
  Cause:
  
  No Key Fields Defined: The DataSource you are trying to use does not have any fields marked as key fields. Key fields are essential for identifying unique records in a dataset.
  Incorrect Configuration: The DataSource may not have been configured correctly during its creation or modification.
  DataSource Type: Some types of DataSources may not inherently have key fields, depending on the source system and the data model.
  
  Solution:
  
  
  Check DataSource Configuration:
  
  Go to the DataSource in the SAP system (transaction code RSA1 for Data Warehousing Workbench).
  Navigate to the DataSource and check its field definitions.
  Ensure that at least one field is marked as a key field. You can do this by editing the DataSource and selecting the appropriate field(s) to be designated as key fields.
  
  
  
  Modify the DataSource:
  
  If no key fields are defined, you will need to add key fields. This can typically be done in the DataSource maintenance screen.
  Select the field(s) that should serve as key fields and mark them accordingly.
  
  
  
  Refer to Long Text:
  
  The error message suggests referring to the long text for more information. You can do this by checking the documentation or help associated with the error message in SAP. This may provide additional context or steps specific to your version of SAP.
  
  
  
  Test the DataSource:
  
  After making changes, test the DataSource to ensure that it now functions correctly and that the error message no longer appears.
  
  
  
  Consult Documentation:
  
  If you are unsure about which fields should be key fields, consult the documentation for the specific DataSource or the data model you are working with.
  
  
  
  Related Information:
  
  Key Fields in DataSources: Key fields are crucial for data integrity and performance in data extraction and reporting. They help in avoiding duplicate records and ensure that data can be accurately joined with other datasets.
  SAP BW Data Modeling: Understanding the principles of data modeling in SAP BW can help in designing effective DataSources with appropriate key fields.
  SAP Notes and Community: Check SAP Notes or the SAP Community for any known issues or additional guidance related to the specific DataSource you are working with.
  
  By following these steps, you should be able to resolve the RSOBI_MF158 error and ensure that your DataSource is correctly configured for use in SAP BW or SAP HANA.